Lamp shade



w MIETHKE 11 w e r 0% M m n aw LAMP SHADE Filed Jan/13, 1931 Aug. 30, 1932.

Patented Aug. 30, 1932 UNITED STATES WALTER m'rnxn, OF. BERLIN, GERMANY LAMP SHADE Application filed January 13, 1931, Serial No. 508,425, and in Germany September 18, 1880.

This invention relates to lamp shades and consists essentially in .an im roved lamp shade adapted for combined irect and indirect illumination and consisting essentially of a light and unbreakable transparent material such as celluloid, foils of cellulose esters, paper, parchment paper we textile fabric and re-enforcing ribs provided on said lamp shade.

By my present invention it will be rendered possible to manufacture lamp shades in large quantities especially with a view of attaining increased rigidity by forming the re-enforcements for lamp shades without the aid of any special reenforcing means of its own material and not of a material foreign to the material of the lamp shades.

According to my invention furthermore the ribs may be arranged in any desired di- En rection of the surface of the lamp shade,

for instance, concentrical therewith. Preferably these ribs are provided in radial direction of the lamp shade and made by. an operation of pressing by casting the same to- 95 gether with the body of the lamp shade,

or by some other suitable process.

The radial ribs so provided on the surface of the lamp shade, aside from being capable of actingas a reenforcement may be of plain so or ornamental design in order to produce decorative effects, if so desired. It will thus be possible to use a relatively very thin material for the lamp shade which by reason of the radially directed ribs is of suflicient as rigidity to preserve its shape, and in addi- 4 to a certain .extent also a direct lighting tion provides for proper transparency whereby the lamp shade, in addition of the aforementioned indirect lighting effect obtained by reflection of the light rays, will produce effect, due to thelight rays which pass from the lamp through the transparent body of the lamp shade.

On account of the extremely light weight 45 of the lamp shade which is made according one end to the periphery of the lamp shade either by special simple fastening devices or also by means of a paste or glue and united at their other ends by means of a very simple clasp, eyelet, hook, ring or the like above the suspended lamp and socket thereof.

It is evident that a lamp shade constructed in the aforementioned manner will be especially adapted for manufacture in large quantities at a very small cost and in particular, may be constructed with the advanu tage of compactly piling up a great number of lamp shades, thus providing extremely convenient facilities for shipping.

In the accompanying drawing Fig. 1 is a diagrammatic side-view partly in section of 7 my new lamp shade having the form of part of a spherically curved surface together with a simple suspension device which may be fastened conveniently to a lamp pendulum cord as indicated in Fig. 1, Fig. 2 a similar 75 diagrammatic side-view of a lamp shade with a double curvature, Fig. 3 a similar diagrammatic side-view of a lamp shade which is of a conformation similar to Fig. 2,

but with adeeper bow than that shown in so Fig. 2, Fig. 4 a top-view on all three forms of lamp shades shown in Figs. 1, 2 and 3,

Fig. 4 showing in particular radial ribs which are pressed in the aforementioned manner into the lamp shade, the periphery 86 of the lamp shade being of wave-shape conformation, Fig. 5 a further top-view of my new lamp shade together with the suspension means, the lamp shade in this case having concentrical ribs and a smooth circular pel0 riphery, and Fig. 6 a similar partly sectional side view showing how the new lamp shade together with its suspension device may be conveniently applied to a lamp cord to be properly suspended therefrom.

In the drawing like reference characters indicate like parts throughout the several figures. The various forms of lamp. shades shown in the several figures are designated with a. The suspension means consist essentially of a number of cords 6, preferably of silk, which at their lower ends are fastened to the lamp shade at the points 0 thereof, preferably at or near itsperiphery, either by means of a glue or paste or also by means of very simple fastening devices( such as a clasp, hook, ring or the like. The several suspension cords b are united at their upper ends with any suitable kind of hook, clasp, ring or the like, (1 shown in Fig. 5. The ribs are desi nated in Figs. 4 and 5 with the reference c aracter e. The lamp shade together with the suspension device may be fastened immediately to a lamp cord as shown in Fig. 6 by inserting the leadsv f of the lamp 9' through the opening 72. in the ring 71 as shown in Fig. 6.

From Fig. 6 in particular it may be seen how the rays issuing from the lamp impinge'upon the surface of the lamp shadea from which said rays are partly reflected upwardly, that is towards the ceiling of the room to be illuminated, and partly pass through the more or less transparent material of the lamp shade essentially in downward direction, that is towards the floor or under part of said room. It will thus be seen that my novel lamp shade forming part of my present invention, in addition to the aforementioned advantages as regards manufacture in large quantities will have the characteristics of a lamp shade which is suitable to' produce a. lighting effect which may be called in part indirect and in part direct,

the indirect lighting effect being attained by those rays which are projected upwardly, while the direct lighting effect will be produced according to the greater or smaller transparency of the lamp shade by those rays which pass therethrough in downward di rection. i c

I claim:

-.1..A lamp shade having a shallow bowlshaped continuous imperforate surface, and consisting of a single piece of a single rela-V tively thin-,light, unbreakable translucid material hav1n radially extendingreinforcing llbs formed y pressing in the material .itself and'constituting the sole stiffening means of the shade.

2. lamp shade consisting of asingle imperforate shallow bowl-shaped piece of a single relatively thin, light, unbreakable translucid material, strengthened solely by suitable substantially radial ribs integral therewith, formed in and of the material itself, supporting means ada ted to be secured to a lamp cord and a. plura ity of light, nonmetallic cords extending from said means to 

